Answer:
Relative dating is the technique to calculate the age of an ancient materials in comparison to another material's age. Layer A is less older, if layer B lies beneath it. Layer A may be 2.5 to 3 million years old.
Explanation:
Before discovery of radioactive carbon dating method, geologists make use of relative dating method in order to determine the age of rock or fossils. The relative dating procedure often referred to as stratigraphy. Though this procedure is not capable of predict absolute age or dating. In relative dating, is mainly based on the fact that the older rock layers will be deeper in respect to the less older rock layer.
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Answer:</h2>
The fossil is <u>A) </u><u>Index fossil</u>.
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Explanation:</h2>
Index fossils refer to the type of fossil which is used to characterize and distinguish geologic periods. Due to this function of index fossil, they are also called as guide fossil or indicator fossil. These fossils must have a short vertical range, wide geographic circulation, and quick developmental patterns.
Another term, Zone fossil is utilized when the fossil have every one of the characters expressed above with the exception of wide topographical dispersion, they are restricted to a zone and can't be utilized for relationships of stratas.
Answer:
The correct answer is C) foundation species
Explanation:
Foundation species are species who play a great role in creating a suitable habitat and maintaining that habitat that supports the living of a community with many different species.
They are also referred to as ecosystem engineers because they are able to create and modify a new habitat that affects the lives of many species. Some of the examples of foundation species are earthworms, beavers, corals.
Beavers are famous foundation species that transform their environment from streams to ponds by making dams that support living of other animals like some fish species like trout, many plant species, amphibians, and birds.
Therefore the correct answer is C) foundation species.
